Bug 40005

Summary: kernel crash in nv50_crtc_do_mode_set_base during shutdown
Product: xorg Reporter: Christoph Anton Mitterer <calestyo>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.6 (2010.12)   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
kern.log
none
fix none

Description Christoph Anton Mitterer 2011-08-11 05:14:06 UTC 
Hi.

Attached log shows some strange crash that happens usually when I shut down the system just before poweroff (or reboot).
Seems to be somehow nouveau related?!

Also notice the "[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 34" during boot a bit earlier.


Using:
- Debian sid
- Linux 3.0
- G86 [GeForce 8400M G] (rev a1)


Cheers,
Chris.
Comment 1 Christoph Anton Mitterer 2011-08-11 05:15:29 UTC 
Created attachment 50121 [details]
kern.log
Comment 2 Marcin Slusarz 2011-08-11 09:20:23 UTC 
Line starting with "Code: f0 48" seems to be truncated. Can you recheck this is all you got?
Comment 3 Christoph Anton Mitterer 2011-08-11 10:15:02 UTC 
I've just checked it... it is complete (well at least nothing more made it in the log).
Comment 4 Emil Velikov 2011-08-21 14:46:32 UTC 
Created attachment 50441 [details] [review]
fix

The issue occurs when another monitor has been connected to the card

Upon shutdown, nv50_crtc_do_mode_set_base() tries to use the non-existing FB of the unplugged crtc, thus causing the BUG
Comment 5 Emil Velikov 2011-08-26 10:53:05 UTC 
The patch provided fixes the issue on my system

Christoph if you are still having this issue please reopen the bug and provide some fresh information

Marking as FIXED
Comment 6 Florian Mickler 2011-10-06 05:52:22 UTC 
A patch referencing this bug report has been merged in Linux v3.1-rc6:

commit ffbc559b0699891c6deb9fd2b4750671eab94999
Author: Emil Velikov <emil.l.velikov@gmail.com>
Date:   Sun Aug 21 22:48:12 2011 +0100

    drm/nv50/crtc: Bail out if FB is not bound to crtc

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